The utility model discloses an antenna pedestal servo balance weight device characterized by being arranged on a bottom of an antenna pedestal X-axle box body mechanism; the balance weight device comprises a balance weight installation cylinder in a cylinder shape in a transverse arrangement; a balance block is arranged in the balance weight installation cylinder; two ends of the balance weight installation cylinder are respectively provided with bulkheads; and a middle part of the balance weight installation cylinder body is connected with the X-axle box body through a support. The balance weight device is simple in structure and small in occupation volume, can improve the disadvantage of big antenna driving moment, can simultaneously and conveniently increase or decrease balance weight through arranging the balance block and the bulkheads, is flexible in usage, and especially is suitable for being used in a servo tracking system of a miniature antenna.